MathBabbler was BABbling about the number

1776and discovered that`sqrt(1776)`

rounded to the nearest whole number is42.The number

42is "The Answer to the Ultimate Question of Life, the Universe, and Everything, according to Douglas Adams' series The Hitchhiker's Guide to the Galaxy."The query "the answer to life, the universe, and everything" into Google (without the quote marks), produces the answer

42by the Google calculator. [was true on 4 July 2007]42 in binary is 101010 (odious) 42 days is 10! seconds 42 is a Harshad number (4 + 2 is a factor of 42) 42 is unhappy 42 is abundant (sum_proper_divisors(42) = 54) log(42) = 1.62 (Phi rounded to the nearest hundredth) floor(sqrt(1776)) = 42## Update::2008.01.25

Super Bowl XLII is being played in Glendale, Arizona, during February 2008. For some reason the Super Bowl numbering is done using Roman numerals. It turns out

XLIIis42.MathBabbler inserted this update because he didn't know how to convert Roman numerals into decimal numbers and he has now learned how to do it (to an extent). He alerted his CSC100 students that they might get an opportunity to write a Roman numeral-decimal number converter program.

XLII = 42 X=10 L=50 I=1 X is less than L and since X proceeds L, X is subtracted from L and two I's are added (i.e. 50 - 10 + 1 + 1 = 42)The date of Super Bowl XLII was II/III/MMVIII.

The last time a Super Bowl was played in Arizona was Super Bowl XXX and it was played on I/XXVIII/MCMXCVI.

## Update::2008.05.02

Groups.Google.com::Why 42? - alt.fan.douglas-adams

## Update::2009.08.16

MathBabbler learned from the Arizona Republic that Elvis Presley died at the age of

`on 16 August 1977.`

42The MBNA (MathBabbler Number Analyst) changed a lot between the time this nBAB was created (2007.07.04) and this date of this update (2009.08.16).

MathBabbler Number Analyst (MBNA) output: ========================================= 42 is a natural, whole, integer 42 is even 42 proper divisors are: 1,2,3,6,7,14,21, 42 is abundant (sum of divisors is 54) 42 is unhappy 42 is a Harshad number 42 is not prime 42 has the prime factors: 2*3*7 (sum=12) 42 is sphenic (had 3 unique prime factors) 42 sum of prime factors is: 12 42 is undulating 42 is pronic (oblong) 42 is ThurmNumber 42 in octal is 052 42 in hexadecimal is 0x2a 42 in binary is 101010 (is odious) 42 nearest square numbers: -6...7 (36...49 [7]) sqrt(42) = 6.48074 ln(42) = 3.73767 log(42) = 1.62325 42 reciprocal is .02380952380952380952380952380952 42! is 1.40501e+51 42 is 13.369 Pi years 42 is 2 score and 2 years 42 written as a Roman numeral is XLII

`is the smallest ThurmNumber. [A ThurmNumber is a number that when written in score plus number format has a prime score and a prime plus number.]`

42MathBabbler posted this update at the age of 52, which in octal (i.e. base-8), is

`. In addition, 52 is the average of`

42`and`

42_{12}`(i.e. 50 and 54, respectively).`

42_{13}

`in hexadecimal (base-16) is repdigit 66 in decimal (base-10) and`

42`in base-5 is base-10 repdigit 22.`

42

`log(`

(1.62325) rounded to the nearest hundredth equals Phi (i.e. the golden ratio) rounded to the nearest hundredth.42)## Update::2009.11.27

BBC.co.uk::H2G2::42

**Creator:** Gerald Thurman
[gthurman@gmail.com]

**Created:** 04 July 2007

This work is licensed under a Creative Commons Attribution 3.0 United States License.